CN210317395U - KXJ0.2-127 mining flame-proof and intrinsic safety type control box - Google Patents
KXJ0.2-127 mining flame-proof and intrinsic safety type control box Download PDFInfo
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- CN210317395U CN210317395U CN201920810338.1U CN201920810338U CN210317395U CN 210317395 U CN210317395 U CN 210317395U CN 201920810338 U CN201920810338 U CN 201920810338U CN 210317395 U CN210317395 U CN 210317395U
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Abstract
The utility model belongs to the technical field of control boxes, in particular to an KXJ 0.2.2-127 mining flameproof and intrinsically safe control box, which comprises a power supply, wherein the power supply is connected with a power transformer, the power transformer is respectively connected with a 1 st path direct current stabilized power supply and a 2 nd path non-intrinsically safe power supply, the 1 st path direct current stabilized power supply is connected with an intrinsically safe power supply I, the intrinsically safe power supply I is respectively connected with an intrinsically safe processing circuit and a bidirectional linear isolation amplifying circuit, and a multifunctional control box integrating signal communication, emergency stop protection and position alarm, tail overwinding protection and tail tearing protection is provided by the aid of the installed bidirectional linear isolation amplifying circuit and overcurrent protection, power lines share one cable (4 cores) for transmission, and installation and maintenance are convenient due to low installation cost (only four-core cables are adopted between a station and a station), so as to meet the requirement of coal mine safety production.
Description
Technical Field
The utility model belongs to the technical field of the control box, concretely relates to KXJ 0.2.2-127 mining flame proof concurrently ann's type control box.
Background
Because the colliery is special occasion in the pit, according to colliery "safety regulation" requirement, the intrinsic safe signal must not use the cable transmission with non-intrinsic safe signal sharing, and the 127V power of many control boxes must adopt a cable to be in the same direction as even, in order to practice thrift the cost, it is more convenient to install, generally adopts four-core cable power supply, all adopts the carrier wave mode now to couple the intrinsic safe signal to the power supply line through the mode of carrier wave on, carries out long distance transmission through the power cord. Due to the characteristics of underground conditions of the coal mine, the method has the advantages of short transmission distance, high noise, poor call quality and single function, and cannot meet the actual requirements.
The problems of the prior art are as follows:
the existing mining explosion-proof and intrinsically safe control box is subjected to the underground condition characteristics of a coal mine, so that the method is short in transmission distance, high in noise, poor in communication quality and single in function, and cannot meet the actual requirements.
SUMMERY OF THE UTILITY MODEL
To solve the problems set forth in the background art described above. The utility model provides an KXJ 0.2.2-127 mining flame proof and intrinsic safety type control box has the characteristics of far away, the noise is little, the function is many.
In order to achieve the above object, the utility model provides a following technical scheme: an KXJ 0.2.2-127 mining flameproof and intrinsically safe control box comprises a power supply, the power supply is connected with a power transformer, the power transformer is respectively connected with a 1 st path direct current stabilized power supply and a 2 nd path non-intrinsic safety power supply, the 1 st path direct current stabilized power supply is connected with an intrinsic safety power supply I, the intrinsic safety power supply I is respectively connected with an intrinsic safety processing circuit and a bidirectional linear isolation amplifying circuit, the bidirectional linear isolation amplifying circuit is connected with the intrinsic safety processing circuit, the intrinsic safety processing circuit comprises a conversation signal processing circuit, a control voice processing circuit, a power amplifying circuit and a loudspeaker, the 2 nd non-intrinsic safety power supply is respectively connected with a bidirectional linear isolation amplifying circuit and a non-intrinsic safety circuit, the bidirectional linear isolation amplifying circuit is connected with the non-intrinsic safety circuit, and the bidirectional linear isolation amplifying circuit is connected with a 2-core non-intrinsic safety transmission line, and the non-intrinsic safety signal and the intrinsic safety type signal are transmitted in a bidirectional linear isolation manner.
Preferably, the bidirectional linear isolation transmission includes an intrinsically safe signal, a non-intrinsically safe signal, a voltage stabilizing module, a voltage comparator, a resistor, a potentiometer, a capacitor and a triode, the intrinsically safe signal is X1 and X2, the non-intrinsically safe signal is X, the voltage stabilizing module is UM1 and UM2, the voltage comparator is IC1, IC2, IC3, IC4, IC5 and IC6, the resistor is R1, R2, R3, R4, R6, R7, the voltage comparator is IR 7 and IR 7, the capacitor is C7, the triode is Q7 and Q7, the intrinsically safe signal X7 is converted into an intrinsically safe signal processing IC, the intrinsically safe signal processing IC 7, the intrinsically safe signal is input to an intrinsically safe signal processing IC 7, the intrinsically safe signal processing IC is input to another circuit, the intrinsically safe signal processing IC 7, the circuit is input to another circuit 7, the intrinsically safe signal processing IC 7, the circuit is an intrinsically safe signal processing IC 7, the circuit is input to the circuit 7, the circuit is an intrinsically safe signal processing circuit 7, the circuit 7, the circuit is an intrinsically safe, the voltage stabilizing module UM1, the resistors R1 and R4 form first-stage voltage stabilization, the potentiometer IR1, the comparator IC1, the resistors R5, R9 and R8 and the capacitor C4 form first-stage overcurrent protection, and the multifunctional control box has the functions of signal communication, emergency stop protection and position alarm, tail over-winding protection and tail tearing protection.
Preferably, the intrinsic safety signal X1 is amplified by an amplifier IC3, then is output to an optical coupler IC2 through a linear triode Q1, and is linearly compensated by an IC2 and a Q1, a signal output from a pin 5 of an IC2 is subjected to impedance conversion by an IC1 to obtain a signal X which is completely consistent with that of the X1, the signal is completely isolated from X1, so that signal conversion from intrinsic safety to non-intrinsic safety is realized, the lower part of the signal is a non-intrinsic safety to intrinsic safety unidirectional isolation linear amplification circuit, and the signal X is composed of an integrated block IC4, an IC6, an optical coupler IC5, a triode Q2, resistors R1, R2, R3, R6 and a capacitor C1; the working principle is the same as that of the circuit, signal conversion from non-intrinsic safety to intrinsic safety is achieved, and the intrinsic safety signal X2 is sent to an intrinsic safety circuit to carry out frequency amplitude identification and then corresponding control information is output.
Preferably, the power transformer converts an input 127V power supply into two independent ac output voltages UA and UB, and respectively sends the two independent ac output voltages UA and UB to the two dc regulated power supplies, wherein the 1 st dc regulated power supply outputs an intrinsically safe power supply U1 to supply power to the intrinsically safe processing circuit and the bidirectional linear isolation and amplification circuit after being processed by the intrinsically safe power supply, and the 2 nd non-intrinsically safe power supply outputs E2 to supply power to the bidirectional linear isolation and amplification circuit and the non-intrinsically safe circuit.
Preferably, the bidirectional linear isolation amplifying circuit is composed of two parts, one is a non-intrinsic safety signal to intrinsic safety signal, the other is an intrinsic safety signal to non-intrinsic safety signal, the 2-way structure is completely the same, the circuit is composed of an integrated block IC1, an IC3, an optical coupler IC2, a triode Q1, a resistor R4, R5, R7, R8 and a capacitor C2, wherein the circuit is composed of an IC1, an IC2, a Q1 and an IC3, and the circuit is composed of an IC4, an IC5, a Q2 and an IC6 to form a non-safety intrinsic safety signal to intrinsic safety; the bidirectional linear isolation amplifying circuit has the advantages of long transmission distance, strong anti-interference capability, low noise and good passing quality.
Preferably, the power supply comprises two groups of power supplies, one group of intrinsic safety power supplies provides power for the intrinsic safety circuit and the bidirectional linear isolation circuit, the other group of non-intrinsic safety power supplies provides power for the non-intrinsic safety part and the bidirectional linear isolation circuit, an intrinsic safety signal (information) formed by the intrinsic safety circuit is converted into a non-intrinsic safety signal through the linear isolation amplification circuit and transmitted with a power line sharing cable (4 cores), meanwhile, the non-intrinsic safety signal (information) of each online station is converted into an intrinsic safety signal after being amplified through linear isolation, the intrinsic safety signal controls corresponding functions after being subjected to frequency discrimination and amplitude discrimination processing of the intrinsic safety circuit, and the power supply has the advantages of low installation cost (only adopting the 4-core cable between the stations) and convenience in installation and maintenance so as to meet the requirement of coal mine safety production.
Preferably, the intrinsically safe power supply comprises two-stage voltage stabilization and two-stage overcurrent protection, so that when any one stage is damaged, the intrinsically safe characteristic cannot be changed, the UMI and the IC1 form 1 st-stage voltage stabilization and 1 st-stage overcurrent protection, and the UM2 and the IC2 form 2 nd-stage voltage stabilization and 2 nd-stage overcurrent protection.
Compared with the prior art, the beneficial effects of the utility model are that: the purpose of bidirectional linear isolation amplifying circuit and overcurrent protection through installation is to provide a multifunctional control box which has long transmission distance, strong interference resistance, signal communication, emergency stop protection, position alarm, tail overwinding protection and tail tearing protection, and the power line shares one cable (4 cores) for transmission, so that the installation and maintenance are convenient (only four-core cables are adopted between the platforms) and the installation cost is low, thereby meeting the requirement of coal mine safety production.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of a circuit principle structure of the intrinsically safe power supply I of the present invention;
FIG. 3 is a schematic diagram of the bidirectional linear isolation amplifying circuit of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Referring to fig. 1-3, the present invention provides the following technical solutions: an KXJ 0.2.2-127 mining explosion-proof and intrinsic safety type control box comprises a power supply, wherein the power supply is connected with a power transformer, the power transformer is respectively connected with a 1 st direct-current stabilized power supply and a 2 nd non-intrinsic safety power supply, the 1 st direct-current stabilized power supply is connected with an intrinsic safety power supply I, the intrinsic safety power supply I is respectively connected with an intrinsic safety processing circuit and a bidirectional linear isolation amplifying circuit, the bidirectional linear isolation amplifying circuit is connected with the intrinsic safety processing circuit, the intrinsic safety processing circuit comprises a conversation signal control voice processing circuit, a power amplifying circuit and a loudspeaker, the 2 nd non-intrinsic safety power supply is respectively connected with a bidirectional linear isolation amplifying circuit and a non-intrinsic safety circuit, the bidirectional linear isolation amplifying circuit is connected with a 2-core non-intrinsic safety transmission line, and the non-intrinsic safety signal and the intrinsic safety signal are transmitted in a bidirectional linear isolation.
In this embodiment: the intrinsically safe signal X1 is processed by an output linear amplification circuit consisting of an operational amplifier IC3, a triode Q1 and an operational amplifier IC2 and then is input to the operational amplifier IC1, because the IC2 is respectively provided with 2 groups of power supplies, 1 path is an intrinsically safe power supply, and the other 1 path is a non-intrinsically safe power supply, the isolated transmission of the intrinsically safe signal to the non-intrinsically safe signal is realized, meanwhile, the non-intrinsically safe signal X is converted into the intrinsically safe signal X2 through IC4, Q2, IC5 and IC6 and then is input into the intrinsically safe circuit for re-amplification treatment, wherein a voltage stabilizing module UM1, resistors R1 and R4 form a first-stage voltage stabilization, a potentiometer IR1, a comparator IC1, resistors R5, R9, R8 and a capacitor C4 form a first-stage overcurrent protection, and the multifunctional control box has signal communication, emergency stop protection and position alarm, tail overwinding protection and tail tearing protection, and has strong anti-interference and low noise capacity, the communication quality is good, the intrinsic safety signals (information) formed by the intrinsic safety circuit are converted into non-intrinsic safety signals through the linear isolation amplifying circuit and transmitted by sharing one cable (4 cores) with a power line, meanwhile, the non-intrinsic safety signals (information) of all stations on line are converted into intrinsic safety signals after being amplified through linear isolation, the intrinsic safety signals are subjected to frequency discrimination and amplitude discrimination processing of the intrinsic safety circuit and then control corresponding functions, and the installation and maintenance are convenient due to the fact that the installation cost is low (only 4-core cables are adopted between the stations) so that the requirement of coal mine safety production can be met.
Specifically, the bidirectional linear isolation transmission includes an intrinsically safe signal, a non-intrinsically safe signal, a voltage stabilizing module, a voltage comparator, a resistor, a potentiometer, a capacitor and a triode, the intrinsically safe signal is X1 and X2, the non-intrinsically safe signal is X, the voltage stabilizing module is UM1 and UM2, the voltage comparator is IC1, IC2, IC3, IC4, IC5 and IC6, the resistor is R1, R2, R3, R4, R6, R7, the voltage comparator is IR 7 and IR 7, the capacitor is C7, the triode is Q7 and Q7, the intrinsically safe signal X7 is converted into an intrinsically safe signal by an intrinsically safe IC 7, an intrinsically safe signal processing IC 72, an intrinsically safe signal processing IC circuit, an intrinsically safe signal processing circuit, an intrinsically safe circuit, the voltage stabilizing module UM1, the resistors R1 and R4 form first-stage voltage stabilization, the potentiometer IR1, the comparator IC1, the resistors R5, R9 and R8 and the capacitor C4 form first-stage overcurrent protection, and the multifunctional control box has the functions of signal communication, emergency stop protection and position alarm, tail over-winding protection and tail tearing protection.
Specifically, after an intrinsic safety signal X1 is amplified by an amplifier IC3, the intrinsic safety signal X1 is output to an optical coupler IC2 through a linear triode Q1, linear compensation is carried out through an IC2 and a Q1, a signal output by a pin 5 of an IC2 is subjected to impedance conversion through an IC1 to obtain a signal X which is completely consistent with the signal X of the X1, the signal is completely isolated from X1, signal conversion from intrinsic safety to non-intrinsic safety is realized, the lower part of the signal is a non-intrinsic safety-to-intrinsic safety unidirectional isolation linear amplification circuit, and the signal X is composed of an integrated block IC4, an IC6, an optical coupler IC5, a triode Q2, resistors R1, R2, R3, R6 and a capacitor C1; the working principle is the same as that of the circuit, signal conversion from non-intrinsic safety to intrinsic safety is achieved, and the intrinsic safety signal X2 is sent to an intrinsic safety circuit to carry out frequency amplitude identification and then corresponding control information is output.
Specifically, the power transformer converts an input 127V power supply into two independent alternating current output voltages UA and UB, and respectively sends the two independent alternating current output voltages UA and UB to two direct current stabilized power supplies, wherein the 1 st direct current stabilized power supply outputs an intrinsic safety power supply U1 to supply power to an intrinsic safety processing circuit and a bidirectional linear isolation amplifying circuit after being processed by the intrinsic safety power supply, and the 2 nd non-intrinsic safety power supply outputs E2 to supply power to the bidirectional linear isolation amplifying circuit and the non-intrinsic safety circuit.
Specifically, the bidirectional linear isolation amplifying circuit comprises two parts, wherein one part is a non-intrinsic safety signal converted into an intrinsic safety signal, the other part is an intrinsic safety signal converted into a non-intrinsic safety signal, the 2-way structure is completely the same, the intrinsic safety-to-non-intrinsic safety unidirectional isolation amplifying circuit comprises an integrated block IC1, an IC3, an optical coupler IC2, a triode Q1, a resistor R4, R5, R7, R8 and a capacitor C2, an intrinsic safety-to-non-intrinsic safety circuit is formed by an IC1, an IC2, a Q1 and an IC3, and a non-safety-to-intrinsic safety circuit is formed by an IC4, an IC5, a Q2 and an IC 6; the bidirectional linear isolation amplifying circuit has the advantages of long transmission distance, strong anti-interference capability, low noise and good passing quality.
Specifically, the power supply comprises two groups of power supplies, one group of intrinsic safety power supplies provides power for the intrinsic safety circuit and the bidirectional linear isolation circuit, and the other group of non-intrinsic safety power supplies provides power for the non-intrinsic safety part and the bidirectional linear isolation circuit; an intrinsic safety signal (information) formed by the intrinsic safety circuit is converted into a non-intrinsic safety signal through the linear isolation amplifying circuit and transmitted by sharing one cable (4 cores) with a power line, meanwhile, the non-intrinsic safety signal (information) of each online station is converted into the intrinsic safety signal after being amplified through linear isolation, the intrinsic safety signal controls corresponding functions after being subjected to frequency discrimination and amplitude discrimination processing of the intrinsic safety circuit, and the installation and maintenance convenience is realized, wherein the installation cost is low (only 4 cores of cables are adopted between the stations), so that the requirement of coal mine safety production is met.
Specifically, the intrinsic safety power supply consists of two-stage voltage stabilization and two-stage overcurrent protection, and the intrinsic safety characteristic of the intrinsic safety power supply cannot be changed when any one stage is damaged; UMI and IC1 form the 1 st stage voltage stabilization and 1 st stage overcurrent protection, and UM2 and IC2 form the 2 nd stage voltage stabilization and 2 nd stage overcurrent protection.
The utility model discloses a theory of operation and use flow: the intrinsically safe signal X1 is processed by an output linear amplification circuit consisting of an operational amplifier IC3, a triode Q1 and an operational amplifier IC2 and then input to an operational amplifier IC1, because the IC2 is respectively provided with 2 groups of power supplies, 1 path is an intrinsically safe power supply, and the other 1 path is a non-intrinsically safe power supply, the isolated transmission of the intrinsically safe signal to the non-intrinsically safe signal is realized, meanwhile, the non-intrinsically safe signal X is converted into the intrinsically safe signal X2 through IC4, Q2, IC5 and IC6 and then input into the intrinsically safe circuit for re-amplification treatment, wherein a voltage stabilizing module UM1, a resistor R1 and a resistor R4 form a first-stage voltage stabilization, a potentiometer IR1, a comparator IC1, a resistor R5, R9, R8 and a capacitor C4 form a first-stage overcurrent protection, and the aim of the installed bidirectional linear isolation amplification circuit is to provide a control box which has the advantages of long transmission distance, strong anti-interference capability, signal communication, emergency stop protection, multifunctional tail tear protection and multifunctional machine roll protection, the power lines share one cable (4 cores) for transmission, so that the installation cost is low (only four-core cables are adopted between the platforms), the installation and the maintenance are convenient, and the requirement of coal mine safety production is met.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides an KXJ0.2-127 mining flame proof and intrinsically safe type control box which characterized in that: comprises a power supply, the power supply is connected with a power transformer, the power transformer is respectively connected with a 1 st path direct current stabilized power supply and a 2 nd path non-intrinsic safety power supply, the 1 st path direct current stabilized power supply is connected with an intrinsic safety power supply I, the intrinsic safety power supply I is respectively connected with an intrinsic safety processing circuit and a bidirectional linear isolation amplifying circuit, the bidirectional linear isolation amplifying circuit is connected with the intrinsic safety processing circuit, the intrinsic safety processing circuit comprises a conversation signal processing circuit, a control voice processing circuit, a power amplifying circuit and a loudspeaker, the 2 nd non-intrinsic safety power supply is respectively connected with a bidirectional linear isolation amplifying circuit and a non-intrinsic safety circuit, the bidirectional linear isolation amplifying circuit is connected with the non-intrinsic safety circuit, and the bidirectional linear isolation amplifying circuit is connected with a 2-core non-intrinsic safety transmission line, and the non-intrinsic safety signal and the intrinsic safety signal are in bidirectional linear isolation transmission.
2. The KXJ 0.2.2-127 mining flameproof and intrinsically safe control box of claim 1, characterized in that: the bidirectional linear isolation transmission comprises an intrinsic safety signal, a non-intrinsic safety signal, a voltage stabilizing module, a voltage comparator, a resistor, a potentiometer, a capacitor and a triode, wherein the intrinsic safety signal is X1 and X2, the non-intrinsic safety signal is X, the voltage stabilizing module is UM1 and UM2, the voltage comparator is IC1, IC2, IC3, IC4, IC5 and IC6, the resistor is R1, R2, R3, R4, R6, R7 and R7, the potentiometer is IR 7 and IR 7, the capacitor is C7, C7 and C7, the triode is Q7 and Q7, the intrinsic safety signal X7 is converted into a non-intrinsic safety signal by an operational amplifier IC 7, an intrinsic safety signal processing circuit IC 7 and an intrinsic safety signal processing circuit IC 7, an intrinsic safety circuit, an intrinsic safety signal processing circuit is further processed by an intrinsic safety circuit, an intrinsic safety circuit IC 7 and an intrinsic safety circuit, an intrinsic safety circuit 7, the voltage stabilizing module UM1 and the resistors R1 and R4 form a first-stage voltage stabilization, and the potentiometer IR1, the comparator IC1, the resistors R5, R9 and R8 and the capacitor C4 form a first-stage overcurrent protection.
3. The KXJ 0.2.2-127 mining flameproof and intrinsically safe control box of claim 1 or 2, which is characterized in that: the intrinsic safety signal X1 is amplified by an amplifier IC3, then is output to an optical coupler IC2 through a linear triode Q1, and is subjected to linear compensation through an IC2 and a Q1, a signal output by a pin 5 of an IC2 is subjected to impedance conversion through an IC1 to obtain a signal X which is completely consistent with X1, the signal is completely isolated from X1, the signal conversion from intrinsic safety to non-intrinsic safety is realized, the lower part of the signal is a non-intrinsic safety to intrinsic safety one-way isolation linear amplification circuit which is composed of an integrated block IC4, an IC6, an optical coupler IC5, a triode Q2, resistors R1, R2, R3, R6 and a capacitor C1, the working principle of the signal conversion from non-intrinsic safety to intrinsic safety is realized, and the intrinsic safety signal X2 is sent to the intrinsic safety circuit to perform frequency amplitude discrimination and then outputs corresponding control information.
4. The KXJ 0.2.2-127 mining flameproof and intrinsically safe control box of claim 1, characterized in that: the power transformer converts an input 127V power supply into two independent alternating current output voltages UA and UB which are respectively sent to two direct current stabilized power supplies, wherein the 1 st direct current stabilized power supply outputs an intrinsic safety power supply U1 to supply power to an intrinsic safety processing circuit and a bidirectional linear isolation amplifying circuit after being processed by the intrinsic safety power supply, and the 2 nd non-intrinsic safety power supply outputs E2 to supply power to the bidirectional linear isolation amplifying circuit and the non-intrinsic safety circuit.
5. The KXJ 0.2.2-127 mining flameproof and intrinsically safe control box of claim 1, characterized in that: the bidirectional linear isolation amplifying circuit comprises two parts, wherein one part is a non-intrinsic safety signal converted into an intrinsic safety signal, the other part is an intrinsic safety signal converted into a non-intrinsic safety signal, the 2-way structure is completely the same, the intrinsic safety-to-non-intrinsic safety unidirectional isolation amplifying circuit is composed of an integrated block IC1, an IC3, an optical coupler IC2, a triode Q1, a resistor R4, R5, R7, R8 and a capacitor C2, an intrinsic safety-to-non-intrinsic safety circuit is composed of an IC1, an IC2, a Q1 and an IC3, and a non-safety-to-intrinsic safety circuit is composed of an IC4, an IC5, a Q2 and an IC 6.
6. The KXJ 0.2.2-127 mining flameproof and intrinsically safe control box of claim 1, characterized in that: the power supply comprises two groups of power supplies, one group of intrinsic safety power supplies provides power for the intrinsic safety circuit and the bidirectional linear isolation circuit, the other group of non-intrinsic safety power supplies provides power for the non-intrinsic safety part and the bidirectional linear isolation circuit, intrinsic safety signals formed by the intrinsic safety circuit are converted into non-intrinsic safety signals through the linear isolation amplifying circuit, the non-intrinsic safety signals and a power line share one cable for transmission, and meanwhile, the non-intrinsic safety signals of all the stations are connected in an online mode.
7. The KXJ 0.2.2-127 mining flameproof and intrinsically safe control box of claim 1, characterized in that: the intrinsic safety power supply comprises two-stage voltage stabilization and two-stage overcurrent protection, the intrinsic safety characteristic of the intrinsic safety power supply cannot be changed when any one stage is damaged, UMI and IC1 of the intrinsic safety power supply form 1-stage voltage stabilization and 1-stage overcurrent protection, and UM2 and IC2 form 2-stage voltage stabilization and 2-stage overcurrent protection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920810338.1U CN210317395U (en) | 2019-05-31 | 2019-05-31 | KXJ0.2-127 mining flame-proof and intrinsic safety type control box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920810338.1U CN210317395U (en) | 2019-05-31 | 2019-05-31 | KXJ0.2-127 mining flame-proof and intrinsic safety type control box |
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| CN210317395U true CN210317395U (en) | 2020-04-14 |
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| CN201920810338.1U Active CN210317395U (en) | 2019-05-31 | 2019-05-31 | KXJ0.2-127 mining flame-proof and intrinsic safety type control box |
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